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originally posted by: neutronflux
a reply to: blackaspirin
I don't know.......
The argument the falling mass decreased because of dust creation seems legit...... Not
originally posted by: FyreByrd
This has probably been posted before - I've no idea what to search for - and it deserves to be posted again.
I'm a solid 911 questioner, finding few satisfying answers, but here is a video that provides one answer to one question and in a truly delightful way:
This guy is the bomb.
Happy Friday
originally posted by: FyreByrd
originally posted by: blackaspirin
originally posted by: FyreByrd
The facade may have been aluminum - but that is irrelevant to the question addressed by the video.
Please don't stray from the topic.
I don't see how that's off-topic. If someone makes an argument regarding molten steel, whether for or against - it's completely relevant to point out that the molten metal did not have to be steel in the first place, and point out the far greater likelihood of it being molten aluminum.
Pointing out the faulty premise, which is on-topic in any argument.
The thread is not about molten steel.
It is about the integrity of structural steel. Specifically that such steel doesn't have to be hot enought to melt to lose it's structural integrity.
Isn't reading comprehension taught in schools any longer ...
www.purdue.edu...
Building fires may reach temperatures of 1,000 degrees Celsius, or more than 1,800 degrees Fahrenheit, said Amit Varma, a Purdue associate professor "
At that temperature, exposed steel would take about 25 minutes to lose about 60 percent of its strength and stiffness," he said. "As you keep increasing the temperature of the steel, it becomes softer and weaker."
originally posted by: neutronflux
a reply to: MALBOSIA
True or false, steel losses 50 percent of its ability to resist strain at 1000 degrees Celsius?
www.purdue.edu...
Building fires may reach temperatures of 1,000 degrees Celsius, or more than 1,800 degrees Fahrenheit, said Amit Varma, a Purdue associate professor "
At that temperature, exposed steel would take about 25 minutes to lose about 60 percent of its strength and stiffness," he said. "As you keep increasing the temperature of the steel, it becomes softer and weaker."
originally posted by: MALBOSIA
originally posted by: FyreByrd
originally posted by: blackaspirin
originally posted by: FyreByrd
The facade may have been aluminum - but that is irrelevant to the question addressed by the video.
Please don't stray from the topic.
I don't see how that's off-topic. If someone makes an argument regarding molten steel, whether for or against - it's completely relevant to point out that the molten metal did not have to be steel in the first place, and point out the far greater likelihood of it being molten aluminum.
Pointing out the faulty premise, which is on-topic in any argument.
The thread is not about molten steel.
It is about the integrity of structural steel. Specifically that such steel doesn't have to be hot enought to melt to lose it's structural integrity.
Isn't reading comprehension taught in schools any longer ...
Yes it is. And it is also taught that correlation does not imply causation.
Just because jet fuel can weaken steel does not mean that jet fuel was the cause of collapse.
originally posted by: [post=22672655]MALBOSIA[[/post]]It would take a proper investigation to conclude any causation. The 911 commission and NIST report were not proper investigations. NIST was paid a small, finite amount of money to produce a report for a government that already went to war based on the what that report was going to show.
Could you imagine if we were already a year into Afghanistan and kicking off Iraq, then NIST came back and said that these buildings could not have collapsed by the force of heat from jet fuel and office furniture.
Meh, it's not like anyone that reported the findings on 9/11 that resulted in the murder of over a million Afghan and Iraqi citizens, were even under oath.
Oops.
originally posted by: blackaspirin
originally posted by: MALBOSIA
originally posted by: FyreByrd
originally posted by: blackaspirin
originally posted by: FyreByrd
The facade may have been aluminum - but that is irrelevant to the question addressed by the video.
Please don't stray from the topic.
I don't see how that's off-topic. If someone makes an argument regarding molten steel, whether for or against - it's completely relevant to point out that the molten metal did not have to be steel in the first place, and point out the far greater likelihood of it being molten aluminum.
Pointing out the faulty premise, which is on-topic in any argument.
The thread is not about molten steel.
It is about the integrity of structural steel. Specifically that such steel doesn't have to be hot enought to melt to lose it's structural integrity.
Isn't reading comprehension taught in schools any longer ...
Yes it is. And it is also taught that correlation does not imply causation.
Just because jet fuel can weaken steel does not mean that jet fuel was the cause of collapse.
You should probably tell the people who keep saying, "jet fuel can't melt steel beams", who are the people the video was addressing.
originally posted by: [post=22672655]MALBOSIA[[/post]]It would take a proper investigation to conclude any causation. The 911 commission and NIST report were not proper investigations. NIST was paid a small, finite amount of money to produce a report for a government that already went to war based on the what that report was going to show.
Could you imagine if we were already a year into Afghanistan and kicking off Iraq, then NIST came back and said that these buildings could not have collapsed by the force of heat from jet fuel and office furniture.
Meh, it's not like anyone that reported the findings on 9/11 that resulted in the murder of over a million Afghan and Iraqi citizens, were even under oath.
Oops.
Whataboutism, the topic is steel.
originally posted by: liejunkie01
a reply to: MALBOSIA
It is not just the fires that caused the collapse.
I have repeatedly asked people to post unedited photos of the impact sites on the buildings. Nobody ever does.
Why is that?
Nobody takes the time to actually look at the amount of damage that the exoskeleton of the buildings received.
The amount of structural damage is staggering and if anyone would take the time to actually learn anything about building construction, they too would realize that the structure suffered damage that was way outside of what the design specifications could handle.
It is a wonder that the towers stood as long as they did.
But nobody wants to look at the actual damage and actually pull up the design specifications, such as I have done, to do their own research.
originally posted by: liejunkie01
a reply to: MALBOSIA
It is not just the fires that caused the collapse.
I have repeatedly asked people to post unedited photos of the impact sites on the buildings. Nobody ever does.
Why is that?
Nobody takes the time to actually look at the amount of damage that the exoskeleton of the buildings received.
The amount of structural damage is staggering and if anyone would take the time to actually learn anything about building construction, they too would realize that the structure suffered damage that was way outside of what the design specifications could handle.
It is a wonder that the towers stood as long as they did.
But nobody wants to look at the actual damage and actually pull up the design specifications, such as I have done, to do their own research.
originally posted by: blackaspirin
originally posted by: neutronflux
a reply to: xdriver14
The steel and anything of mass will try to fall stright down. Baring collisions like a Newton's cradle. That is what gravity does, it exerts a force that tries to pull objects straight to the center of the earth.
It's doesn't matter on the tower where the 29 floors fell. The connections for the first floor below was only rated for the weight equivalent to 12 tower floors.
^^^EXACTLY.
He doesn't realize that when it fails, it is all of the upper floors crashing down on the next floor - which is not built to sustain the DYNAMIC LOAD (not static load) of all the upper floors.
The combined weight of all the upper floors, and the force that they accumulate when they drop through the impact zone onto the next lower floor - is ENORMOUS. Far too enormous for the next floor in succession to even remotely slow them down.
So if you start with 31 floors, crashing down on the next floor - they crush it, and now you have the dynamic load of 32 floors crashing down on the next one. That one gets crushed, and you have the dynamic load of 33 floors crashing down on the next one, and the process continues all the way down.
If the very first floor to be hit with the dynamic load of all the upper floors cannot sustain that force, then it's game over. The next floor in line will do no better, and so on. The force keeps accumulating, and there is nothing strong enough to withstand it.
But I'm not a YouTube video with spooky music and sinister overtones, so screw what I have to say!
originally posted by: blackaspirin
There's a curious back-and-forth that goes on with this:
OS: The collapses were a result of the combination of structural damage and ensuing fires, which weakened the steel sufficiently to cause failure, and a global collapse